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Finding the Fourth Proportional to 36,149.76, 54,213.12 and 11,520

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Solution

The fourth proportional to 36,149.76, 54,213.12 and 11,520 is: 17,276.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,149.76 : 54,213.12 = 11,520 : x
  2. Step 2: Convert to fraction form
    36,149.76/54,213.12 = 11,520/x
  3. Step 3: Cross multiply
    36,149.76x = 54,213.12 × 11,520
  4. Step 4: Simplify right side
    36,149.76x = 624,535,142.40
  5. Step 5: Solve for x
    x = 624,535,142.40/36,149.76
  6. Step 6: Final answer
    x = 17,276.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.